You get this error because the exfat filesystem is not installed in Ubuntu by default. exFAT is a proprietary and patented by Microsoft.

Ubuntu 14.04 or higher

Since Ubuntu 13.10, this package is in the main repository. Just install exfat-fuse and exfat-utils:

sudo apt-get install exfat-fuse exfat-utils

Ubuntu 12.04

For ubuntu 13.04 and lower, you'll need a ppa to install the exfat support. Installation procedure:

sudo apt-get install exfat-fuse exfat-utils

If you see the error gpg: "tag:launchpad.net:2008:redacted" not a key ID: skipping during the apt-add-repository step, then you'll need to manually install the signing key and run the apt-get update and apt-get install steps after that:

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eV@gabond - The Meaning

" I want to be an educated vagabond, not a vagabond out of weakness. I don't want to do anything in my life out of weakness - because I could not be anything else, that's why I am a Vagabond - that is not my way. First I want to prove to the world that I can be anything that I want to be, but still I choose to be a vagabond - out of strength. Then there is respectability even if you are a Vagabond, because respectability has nothing to do with your vocation, your profession; respectability has something to do with acting our of strength, clarity, intelligence. "